OEM 2002 Buick Century Engine Control Module

2002 Buick Century Engine Control Module Parts and Q&A

• Q: What are the key considerations for programming an Engine Control Module with the Service Programming System (SPS) on 2002 Buick Century?

  A: A technician can utilize the service programming system (SPS) via the data link connector (DLC) to program control modules through the serial data circuit that also contains the diagnostic trouble codes (DTCs) retrieval and data display features. Control modules combine flash read only memory with electrically erasable programmable read only memory which stores the learned information including control module security data and software identification numbers as well as crankshaft learned values and vehicle identification number and software identification numbers in different memory types. The programming strategies consist of both remote programming through (Tech 2) and pass thru programming through (Tech 2) as well as off-board remote programming utilizing (Off-board Programming Adapter) and off-board pass thru programming through (Off-board Programming Adapter) when the control module remains uninstalled. Programming must only occur if replacing the control module or when new software or calibration packages become available only if the vehicle system voltage stays between 12 and 16 volts while charging systems show no faults and the battery charger remains disconnected. Perform the programming procedure with all battery-loading systems disabled by placing the Ignition Switch in the right position then checking that all tool connections remain tight and avoiding tool harness interference. After programming, the powertrain may operate differently, requiring the control module to re-learn values such as fuel trim correction, idle air control (IAC) learned position, and automatic transmission shift adapts, while additional service procedures may be necessary if a control module is replaced, including the crankshaft variation learn procedure, engine oil life reset, idle learn procedure, complete system set procedure, vehicle theft deterrent password learn procedure, and throttle position (TP) sensor learn procedure.